Keratoconus

Definition
Corneal Disorder characterised by the protrusion of central corneal associated with apical thinning and progressive myopia with irregular astigmatism

Clinical Characteristics
Blurred vision that cannot be fully corrected by glasses
Increasing Astigmatism
Glare and monocular diplopia
Sudden decrease in Vision, pain and photo phobia may occur in acute corneal hydrope

CL for Keratoconus management

Options for Keratoconus include:-
Spectacles
Soft Contact lens
Hybrid Contact Lens
INTACS
CXL
Keratoplasty
Ross-K lenses
Nissel K2
Rigid Lenses
Kerasoft ICL
Scleral CL

RGP lenses for Keratoconus
OLD RGP matterials (PMMA) was usually discomfort for Pt
RGP2 as a spherical lens is a better option because of better oxygen transmission to cornea

RGP fitting
usually done from a trial set or ordered from Keratometry reading , along with spectacle refraction and back vertex power (BVD)

The total lens diameter(TD) may be around 9:50mm with the